Hydrogen sulphide is a highly toxic and flammable gas. It is normally prepared in a fume chamber.
(a) Name two reagents that can be used to prepare hydrogen sulphide in the laboratory.
(b) One of the uses of hydrogen sulphide is to produce sulphur as shown in the following equation:
2H2S(g) + S02 (g) -> 3S(s) + 2H20(1)
Identify the reducing agent in this reaction and give a reason for your answer.
(c) Other than production of sulphuric (VI) acid, state one commercial use of sulphur.
(a)Iron (II) sulphide or conc sulphide / copper sulphide (Accp formula: Fes/ HCl)
Hydrochloric acid or lead (II) sulphide/ HNO3
The sulphur changes from -2 to zero/ (it reduces SO2 to S) i.e. +4 to 0 / sulphur lost e’s in the H2S to form sulphur
(c)Vulcanization of rubber
Manufacture of sulphur drugs
Manufacture of gun powder/ match sticks / explosives/ fungicides
Related Chemistry Questions and Answers on Sulphur and It's Compound Form 3 Level
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